Home
Class 12
PHYSICS
A square wire loop of 10.0 cm side lies ...

A square wire loop of `10.0 cm` side lies at right angles to a uniform magnetic field of `7 T`. A `10 V` light bulb is in a series with the loop as shown in Fig. 3.125. The magnetic field decreasing steadily to zero over a time interval `Deltat`. For what value of `Deltat` (im ms), the bulb will shine with full brightness?

Text Solution

Verified by Experts

The correct Answer is:
7
Unduced emf should be equal to `10 V`
`e = A(dB)/(dt) `rarr` 10 = ((10)/(100))^(2)(7)/(Deltat) `rarr` Deltat = 7 ms`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    CENGAGE PHYSICS ENGLISH|Exercise Archives Fill In The Blanks|3 Videos

  • ELECTROMAGNETIC INDUCTION

    CENGAGE PHYSICS ENGLISH|Exercise Archives Single Correct|11 Videos

  • ELECTROMAGNETIC INDUCTION

    CENGAGE PHYSICS ENGLISH|Exercise Exercises Linked Comprehension|36 Videos

  • ELECTRICAL MEASURING INSTRUMENTS

    CENGAGE PHYSICS ENGLISH|Exercise M.C.Q|2 Videos

  • ELECTRON,PHONTS,PHOTOELECTRIC EFFECT & X-RAYS

    CENGAGE PHYSICS ENGLISH|Exercise dpp 3.3|15 Videos

Similar Questions

Explore conceptually related problems

A square loop of side 10 cm and resistance 0.5 Omega is placed vertically in the east-west plane. A uniform magnetic field of 0.10 T is set up across the plane in the north-east direction. The magnetic field is decreased to zero in 0.70 s at a steady rate. The magnitude of current in this time-interval is.

A square loop of side 12 cm and resistance 0.6Omega is placed vertically in the east-west plane. A uniform magnetic field of 0.10 T is set up across the plane in north-east direction. The magnetic field is decreased to zeroin 0.6 s at steady rate. The magnitude of currnet during this time interval is

A uniform magnetic field of 0.20 xx 10^(-3) T exists in the space. Find the the change in the magnetic scalar potential as one moves through 50cm along the field.

A square loop of side 10 cm and resistance 0.5 Omega is placed vertically in the east-west plane. A uniform magnetic field of 0.10 T is set up across the plane in the north-east direction. The magnetic field is decreased to zero in 0.70 s at a steady rate. Determine the magnitudes of induced emf and current during this time-interval.

A square loop of sides 10 cm carries a current of 10 A .A uniform magnetic field of magnitude 0.20 T exists parallel to one of the side of the loop.(a)What is the force acting on the loop? (b)What is the torque acting on the loop?

A square wire of resistance 1.3Omega and side 1cm is moving in uniform magnetic field B=1T with speed 1cm//sec as shown in figure then the current in loop is :

A rectangular coil having 60 turns and area of 0.4 m^(2) is held at right angles to a uniform magnetic field of flux density 5 xx 10^(-5)T . Calculate the magnetic flux passing through it.

A square loop of side 10 cm with its side parallel to X, and y axis is kept in a uniform magnetic field pointing towards positive z-direction. If magnetic field changes at the rate of 0.1 T/s, then induced emf is

A circular loop of radius R=20 cm is placed in a uniform magnetic field B=2T in xy -plane as shown in figure. The loop carries a current i=1.0 A in the direction shown in figure. Find the magnitude of torque acting on the loop.

A circular loop of radius R=20 cm is placed in a uniform magnetic field B=2T in xy -plane as shown in figure. The loop carries a current i=1.0 A in the direction shown in figure. Find the magnitude of torque acting on the loop.